How long does it take to install Call of Duty Black Ops lV

You can play the multiplayer mode offline either with bots or split screen with a friend. You can also play zombies mode offline.

All depends on your internet Download Speed and the size of the game:

Just for the Base game of BO4 the size is 65.47 GB

According to this website

https://support.xbox.com/en-US/xbox-one/networking/troubleshoot-slow-game-or-app-downloads-on-xbox-one

[table][tr][td]Current download speed[/td][td]30-GB file[/td][td]40-GB file[/td][td]50-GB file[/td][td]60-GB file[/td][td]70-GB file[/td][/tr][tr][td]2 Mb/s[/td][td]33.3 hours[/td][td]44.4 hours[/td][td]55.6 hours[/td][td]66.7 hours[/td][td]77.8 hours[/td][/tr][tr][td]5 Mb/s[/td][td]13.3 hours[/td][td]17.8 hours[/td][td]22.2 hours[/td][td]26.7 hours[/td][td]31.1 hours[/td][/tr][tr][td]10 Mb/s[/td][td]6.7 hours[/td][td]8.9 hours[/td][td]11.1 hours[/td][td]13.3hours[/td][td]15.6 hours[/td][/tr][tr][td]20 Mb/s[/td][td]3.3 hours[/td][td]4.4 hours[/td][td]5.6 hours[/td][td]6.7 hours[/td][td]7.8 hours[/td][/tr][tr][td]50 Mb/s[/td][td]1.3 hours[/td][td]1.8 hours[/td][td]2.2 hours[/td][td]2.7 hours[/td][td]3.1 hours[/td][/tr][tr][td]100 Mb/s[/td][td]0.7 hours[/td][td]0.9 hours[/td][td]1.1 hours[/td][td]1.3 hours[/td][td]1.6 hours[/td][/tr][tr][td]200 Mb/s[/td][td]0.3 hours[/td][td]0.4 hours[/td][td]0.6 hours[/td][td]0.7 hours[/td][td]0.8 hours[/td][/tr][/table]

Keep in mind these are steady speeds Internet speeds can fluctuate depending on how many people are using your internet service.

Please return to your original post on the topic.

how do I play off line????

Install speeds heavily depend on your internet speed. As for off line I think only zombies and the sort of training missions can be played offline. The newest one has not single player story mission. You can do bots for the "Multiplayer" mode. I think
split screen as well.